Question

# What happens when dilute hydrochloric acid is added to iron fillings?(a).Hydrogen gas and iron chloride are produced(b).Chlorine gas and iron hydroxide are produced(c).No reaction takes place(d).iron salt and water are produced

Hint: In a chemical reaction, when one or more elements replace one or more elements in a compound, the reaction is called a single displacement reaction. When HCl is added to iron fillings such a displacement occurs.

$Fe+2HCl\to FeC{{l}_{2}}+{{H}_{2}}$
$A+B-C\to A-C+B$